Molding apparatus



Patented Feb. 14, 1928.

UNITED STATES ranno. fr. ymilvints AjNDwrLLrAM n. MceAUsLrNn; or straatnaam, PENNSYLVANIA,

AssIGNons 'ro "Bananarama sanar. COMPANY.

MoLnING anrAnATUs.

Application med april 2e, 1924. serial No. 709,125.

yOur invention relates to molding 'apparatus and it has for an `object to provide a filaskconstrnction havingv a bottom flask in which there is a chamber having a `meld portion and agateportionfin complete and uninterrupted communication with each Aother,.so.that a molded articlemayberead ily removed from the mold.

A further object of our vinvention is to bottom flask, an intermediate flask, and a# coping lflask together with interfitting joints between the flasks, wherebythe flasks may be readily .fitted into accurately assembled relation. n

,y Heretoforethe dra-g necks and wabblers vof chilled cast yiron rolls have been molded in an iron or steel flask so constructed that theyare molded in oneflask while the gate is moldedy in aseparate-flask, called the Elbow flask andbolted tothe drag llask. Sometimes this elbowy flask has :been cast in one piece withthe drag flask, such asin our invention, but ardividing partition .be- .tween lthe two has always been retained. Then when the rolls are cast and ready to be removed from the sand, the gate must-be vhrst broken orcut ofi", thus causing .much labor, loss of timeand possible `damage to the casting itself or to the flask. In our invention' this .partition is omitted. Molding is very '-much facilitated, and the castings may be readily, easily and cheaply removed from the flask and sand without damage to the casting or flask. Our invention is adaptable to either hand molding orinachine molding.

Apparatus made in accordance with our invention is illustrated in the accompanying drawings, forming a part of this application, in which:

Fig. l is a plan view of the flask and showing a section of the runner box;

Fig. 2 is a vertical sectional View volf-the molding apparatus; 1 j n Fig. 3 is a vertical sectionalview showing the flask inverted and placed on a 'drag Plate;

Fig. t is a vertical sectional view ofthe coping; and, Y

Fig. 5Y is adetail view `of a .gatefpattern .Referring now to the drawil'igsand par- 'tcularlyto Fig. 3, the flask lO ijs inverted andl placed on a drag plate 11. yThe pattern 12 for the drag neckfandthepattern for the wabbler neck are y'firmly fastened .tothe drag plate 11, the pin 121 of the pattern 12 `fitting the central opening l5 in the drag plate.

The elbow pattern .16 is ,fastened to .the drag plate y11 with the small `end arranged tangent to theopattern .12 so that V.thegate shall vassume the proper tangential relation to the neck. 'lhe elbow,.patternf16 isma'de in two parts, 17 and .l8,to,permitof ready removal as hereinafter pointed.U out.

The flask lOis next invertedandplaced in position as shown in Fig. ,3,:andii'tis bolt! ed .or fastened down to the drag .plate vllll `any suitable manner. The drag platefisfgprovided with a female portion 20 to..receive a male .portion .21 ontheiilask. .Sand isin scrted through.theopeningQQ andthe mold is prepared in ,the .usual '.way. molding machine is used, the dragplate ...'11 islirst securely fastened in position on .the plate of the machine. f y

l/Vhen the moldis completed, 4theflask :.10

is turnedpver .andthe patterns are lwithdrawn. .Afterthe patternslaud 13 yand the Vpart 18 ofthe .elbow .pattern 4are removed, the part 17 of the elbow vpattern may be .pushed yback into thefspace .formerly oc! cnpied bythe part 18 andreadilyremoved. The elbow. is now ccmpletedas follows: .The curved piece 23, (showninFigg), ispositioned in the space previously occupied by the two-part elbow pattern 16; sand iS packed around it, after which it is removed, leaving a. smooth curved gate passage as indicated in Fig. 2.

In molding the cope, as may be seen from Fig. A, a cope molding plate 26 is placed directly on the drag plate 11, the plate 26, having a lower projection 27 to ht the recess 2O in the dragplate l1 and an upper projection 28 to fit a recess 29 in the cope flask Inl case a 25. Drag neck and wabbler patterns 12 and 13 are fastened to the plates 11 and 26 before the flask 25 is placed in position. r)The cope mold is now prepared in the same manner as the bottom flask mold, already referred to.

Upon reference to Fig. 2. it will be seen that the drag flask 30 is placed on top of the bottom flask 10, the lower end of the drag flask having a recess 3l to receive the projection 2l at the top of the bottom flask. Likewise, the upper end of the drag flask is provided with a projection to fit the recess 29 in the cope mold.

Referring more particularly to Figs. l, 2 and 8, it will be seen that the bottom flask l() is provided with a lateral spout portion 3l which is open to the top of the flask so that the gate is not covered by a portion of' the bottom flask. To prevent metal from breaking through sand at the top of' the spout, it will be seen that the top of the spout is covered by the drag mold and also by the bottom flange 32 of the runner box 33.

The runner box is provided with an upper flange 34 to Which. is fastened the lower flange 3501"' the funnel member 3G. The flanges 32 and 34 are preferably of different sizes so that each runner box may be caused to fit drag molds of different sizes.

While l show a drag flask 30 of the chill mold type, it will be apparent that a flask of the sand mold type might be used. Also, if articles, such as rolls, are to be cast, circumferential rings may be provided; and such articles may be cast and chilled or cast merely in sand. In other Words, in so far as our invention is concerned the mode of casting is immaterial, our invention relating to an improved mold construction consisting of accurately fitting parts and means whereby the bottom flask and top flask molds may be quickly and. economically prepared either by hand or by machine, the bottom flask having a chamber containing mold and gate portions in full communication with each other throughout the height of the chamber so as to avoid any bridging piece or partition.

After an article is molded, the cope and drag molds and the runner box are removed, whereupon the molded article, such as a roll, may be readily removed with the gate por tion attached, the gate portion passing upwardly of the spout and breaking the sand above it. In this Way, the removal of runner box elbows and breaking off of gate portions incident to removal of molded articles, involving labor and frequent breakage of the bottom mold are avoided. After the article is removed, the gate portion may be broken or cut oil' without much likelihood of damaging the article as is the case where the gate portion is broken 0H incident to removing the article from the bottom mold. As the spout portion is entirely covered by the drag mold and the flange of the runner box, the sand of the mold is effectively reinforced,

thereby preventing any breaking throughV the sand of metal from the gate.

Having thus described the invention what we claim as new and desire to secure by Letters Patent is:

l. ln molding apparatus, the combination of a bottom flask, an intermediate drag flask, an interfitting joint between the bottom flask and the drag flask, said bottom flask having a chamber comprising a mold portion and a gate portion unseparated from each other, a cope flask, covering the mold portion of the chamber in the bottom flask, an interfitting joint between the drag flask and the cope flask, and a runner box secured to the bottom flask and disposed over the gate portion thereof to cover same whereby the sand at top of the bottom flask is reinforced.

2. ln molding apparatus, the combination of a bottom flask having a chamber compris ing a mold portion and a lateral gate portion in uninterrupted communication throughout, both portions opening at the top of the flask.

3. ln molding apparatus, the combination of a bottom flask having a chamber compris ing a mold portion and a gate portion, both portions unseparated from each other and each being open to the top of the flask, a drag flask and a runner boi; disposed on top of the bottom flask to cover the mold portion and the gate portion whereby the sand at the top of the bottom flask is reinforced.

In testimony whereof we hereunto aiiix our signatures this 23d day of April 1924:.

FRED C. T. DANIELS. WILLIAM H. MCCAUSLAND. 

